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Introduction When creating a data-driven Web site, one of the most common tasks encountered by web developers is to create a data entry form. The data input form is a web page for the system user with a data input method. Tasks for creating a specific data entry form should usually start with a demand analysis, ie, clearly indicating what information needs to be collected from the user. After the demand determination, the next step is to design the data input web form, including the creation of a graphical user interface, and writing code based on user input update database. When the data input form requirement is known in advance, and this data input form is the same as all users in the system, the creation of such an input form is unlocked. However, if you need a dynamic data to enter the form, the task will become more arduous. For example, consider a company's Internet web application, its purpose is to collect information about the products purchased; a product online registration system. For such applications, issues to users may vary depending on purchasing different products, or due to purchases from the store or purchase from the company Web site. As mentioned above, a selection may be a "strong plus" solution when encountering a dynamic data input user interface. You can create a separate web page for each product sold by the company, each page contains a specific data input element you want. The problem with this original method is to add a new page when the new product is released. Although creating these new pages may not be difficult, but it is time consuming, and if there is no sufficient debugging and test time, it is easy to make mistakes. Ideally, when a new product is released, it should be specified by a non-technical person to specify what problems need to be proposed by ease of use, web-based interface. Such systems can be implemented for ASP.NET because it has the ability to dynamically load controls to the ASP.NET web page during runtime. You only need to put a small amount of initial investment during development and testing, you can create a reusable, dynamic data input user interface engine. Custom data input form can be easily created even if a user understands a very little user. In this article, we will introduce the basics of dynamic controls in ASP.NET, then introduce a complete, operable dynamic data input system, which can easily customize and extension it. The dynamic controls in ASP.NET are well known, and the ASP.NET web page consists of two parts: • HTML section, which contains static HTML tags and web controls to add by declarative syntax. The code section, can be implemented as a separate class file (such as Visual Studio .NET) or in the
